I'm starting to work on my game more seriously and right now I'm in the process of creating
HM2 filters in order to analyze it properly and have a structure when reviewing my sessions.

What filters do you guys use or suggest I should be using?

Right now, I have the following:

As pre-flop raiser:
- Facing leads
- Facing check/raises
- Facing turn leads after I check back flop

As a pre-flop caller:
- Facing c-bets
- Facing 2-barrels
- Flop goes check-check are we are OOP on turn
- Flop goes check-check and we are IP; villain checks to us once again

The same filters would also be applied to 3-bet pots as well.

These are just a sample as I'm in the process of creating the whole process.
Please share your thoughts and suggestions.

All those situations are board and opponent dependant. Only defining if certain hand is profitable play in one spot, requires millions of hands. I would start learning process by defining your own betting, raising and checking ranges in those spots on different boards. Studying which board favours which preflop range, what are continuing ranges in different situations vs different actions etc.

When you wholly understand your own ranges, you can start understanding how opponents playing style varies from yours and you will be able to classify opponent play styles.

Its is a long road to mastery, but that is how I approach learning plo.